British spelling vs devitalisation

British spelling and devitalisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
devitalisation	Yes	No	No	No

British spelling (noun)	devitalisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the act of reducing the vitality of something